per fax : 00-91-22-7655904, 00-91-22-7655702, 00-91-22-7650519

Attn: Mr. Iyer Srinivasan K. / Dr. B. Vaidyanathan.

Dear Mr Srinivasan,

This has reference to the 6 Nos. Channel Selectors procured from you.
I have tested the same and have found the quality and performance excellent. I have installed them on our data acquisition systems where I measure about 60 temperatures of air and water streams through heat exchangers. Your system allows me to measure analog voltages in the -15V...+15V range from various sources like :

• rectified transformer stepped-down AC voltages 0-300V from heaters
• 4-20 mA outputs from flow sensors over a resistor
• 0-10V DC outputs from air speed meters

I would have imagined that to develop a custom built embedded control system with hardware and software would require quite a few revisions in the system - but with your methodical approach and meaningful queries, we have got the system working first time right. Working with your team, using only email, was a pleasure.

I am still amazed that we could develop this system flawlessly without exchanging a single fax or telephone call.

We are sure we will be working with you on a lot of projects together.

With regards,

Ir. E.E. van Andel